docker_volume

#!/bin/sh

usage() {
  echo "Usage: docker_volume <volume_name> <target_directory> [command] [command arguments...]"
}

help() {
  echo "This script mounts <volume_name> to /volume, and <target_dir> to /data"
  echo "in this container."
  echo
  echo "Example:"
  echo "    # List the contents of the volume directory in the container."
  echo "    docker_volume my_volume /target/dir"
  echo
  echo "    # Use the 'ls' command to list all files in detailed format"
  echo "    in /data directory inside the container."
  echo "    docker_volume my_volume /target/dir ls -alF /data"
  echo
  echo "    # Copy a file from the /data directory to the /volume directory"
  echo "    inside the container."
  echo "    docker_vol my_volume /target/dir cp /data/file1 /volume/file2"
}

if [ "$1" = "--help" ] || [ "$1" = "-h" ]; then
  usage
  echo
  help
  exit 1
fi

if [ $# -lt 2 ]; then
  usage
  exit 1
fi

VOLUME_NAME=$1
TARGET_PATH=$2
shift 2

if [ ! -d "$TARGET_PATH" ]; then
  mkdir -p $TARGET_PATH
fi

if [ $# -eq 0 ]; then
  set -- ls -alF /volume
fi

docker run --rm --name file_transfer \
  -v $TARGET_PATH:/data \
  -v $VOLUME_NAME:/volume \
  busybox "$@"